摘要
采用微波法从茶叶中提取茶多酚(T ea po lypheno ls,简称TP),探讨溶剂、微波功率、提取时间、料液比、浸提级数对提取率的影响.正交实验结果表明提取的最优条件为:溶剂为体积分数40%的乙醇,料液比为1∶9(g/mL),微波功率280 W,加热时间30 s,浸提2次.直接在茶多酚浸提液的浓缩液中加入氯化镧合成茶多酚镧配合物TP-L a,与茶多酚对照样品合成的TP-L a比较,通过IR、TEM、紫外吸收等手段进行分析,结果表明:两种方法所合成的纳米茶多酚镧配合物结构基本相似,粒径均在30 nm以内,紫外吸收峰一致.
Microwave-assisted extraction method（MAE） is presented for the extraction of tea polyphenols （TP） from green tea . The optimum parameters were obtained by orthogonal test as follows： the ethanol concentration 40% （v/v）, solid / liquid ratio 1 ： 9 （g/mL） , microwave power 280 W, MAE time 30 second, extracted twice. At the same time, the nano-TP-La compound is preparated directly in contracted liquid, and compared with the nano-TP-La compound preparated with purer TP by IR, TEM and UV spectra. The results indicate that the structures of two TP-La compounds are similitude. The particle size of compounds are about 30 nm, and the compounds have the same UV spectrum.
出处
《福建师范大学学报（自然科学版）》
CAS
CSCD
北大核心
2007年第1期105-108,共4页
Journal of Fujian Normal University：Natural Science Edition
基金
国家"十五"重点科技攻关计划资助项目(2002BA323C)
教育部新世纪优秀人才支持计划项目(NCET040614)
福建省科技计划项目(十一五预研项目
2005H084)
